>What about revelation. There are two ways that the info>could be preserved. 1. oral tradition and 2. revelation.

Absolutely. I have a vague recollection that Henry Morris or Duane Gish
implied in one of their books that the need for information to be orally
transmitted until it got to Moses put a constraint on the age of the most
ancient information. That view always struck me as strange, coming from
someone with Morris' or Gish' Christian credentials. Don't they believe in
miracles?